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Finding the Fourth Proportional to 539,315.20, 809,638.40 and 339,635.20

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Solution

The fourth proportional to 539,315.20, 809,638.40 and 339,635.20 is: 509,871.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,315.20 : 809,638.40 = 339,635.20 : x
  2. Step 2: Convert to fraction form
    539,315.20/809,638.40 = 339,635.20/x
  3. Step 3: Cross multiply
    539,315.20x = 809,638.40 × 339,635.20
  4. Step 4: Simplify right side
    539,315.20x = 274,981,699,911.68
  5. Step 5: Solve for x
    x = 274,981,699,911.68/539,315.20
  6. Step 6: Final answer
    x = 509,871.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.